<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    const obj = {
      uname: 'pink',
      age: 18,
      family: {
        baby: '小pink'
      }
    }
    // 浅拷贝
    // const o = { ...obj }
    // console.log(o)
    // o.age = 20
    // console.log(o)
    // console.log(obj)
    const o = {}
    Object.assign(o, obj)
    o.age = 20
    o.family.baby = '老pink'
    console.log(o)
    console.log(obj)
  </script>
</body>

</html>